Can someone tell me what's wrong with my program?

Question

#include <iostream>
#include <math.h>
using namespace std;

int main()
{
int N,i=0,j=1;
int m=0,p=1,max,max2=1;
cin>>N;
int a[N];
for (;i<N;i++)
cin>>a[i];
max=abs(a[i]-a[j]);
for (;i<N;i++)
for (;j<N-1-i;j++)
{
if(abs(a[i]-a[j+1])>=max)
{
m=i;
p=j+1;
if(abs(m-p)>max2)
max2=abs(m-p);
max =abs(a[i]-a[j+1]);
}
}
cou

Answer 1

You cannot declare a non-constant value to the size of an array.

int a[N];

since N is not a constant, as it is input by the user, here is the error.

If you need dynamic groups of data, use a vector.

(Also, the random "cou" at the end, but I'm sure that's a typo).